Free bootstacks after AP startup.
ClosedPublic
Actions

Authored by kib on Dec 8 2018, 11:26 PM.

Tags

None

Referenced Files

	F176019112: D18486.id.diff
	Thu, Oct 15, 8:44 AM

	Unknown Object (File)
	Sun, Oct 4, 4:01 AM

	Unknown Object (File)
	Fri, Oct 2, 8:06 AM

	Unknown Object (File)
	Tue, Sep 29, 12:47 AM

	Unknown Object (File)
	Fri, Sep 25, 7:25 AM

	Unknown Object (File)
	Fri, Sep 25, 5:08 AM

	Unknown Object (File)
	Thu, Sep 24, 6:22 PM

	Unknown Object (File)
	Thu, Sep 24, 2:57 PM

View All Files

Subscribers

imp

Details

Reviewers

jhb
royger

Commits

rS341810: Free bootstacks after AP startup.

Summary

Bootstacks are unused after APs executed sched_throw() in init_secondary_tail() and started executing on proper idle thread stack.
Add sysinit that detects that the idle thread for each CPU was scheduled at least once, and free corresponding bootstack.

I believe that slight addition of the code (~200 bytes) is worth it, because even on typical small modern desktop CPU we leak 128K of memory otherwise (4 pages x 8 threads).